6781800553 has 16 divisors (see below), whose sum is σ = 7567416576. Its totient is φ = 6025277440.

The previous prime is 6781800527. The next prime is 6781800569. The reversal of 6781800553 is 3550081876.

It is not a de Polignac number, because 6781800553 - 2¹⁷ = 6781669481 is a prime.

It is a super-2 number, since 2×6781800553² = 91985637481342211618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6781800353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127200 + ... + 172462.

It is an arithmetic number, because the mean of its divisors is an integer number (472963536).

Almost surely, 2^6781800553 is an apocalyptic number.

It is an amenable number.

6781800553 is a deficient number, since it is larger than the sum of its proper divisors (785616023).

6781800553 is a wasteful number, since it uses less digits than its factorization.

6781800553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45584.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 6781800553 is about 82351.6882219181. The cubic root of 6781800553 is about 1892.8447919122.

The spelling of 6781800553 in words is "six billion, seven hundred eighty-one million, eight hundred thousand, five hundred fifty-three".